Established in 1955, Xi’an Lite SIMO Motor Co., Ltd (popularly known as SIMO Motor) has established itself as the leading cornerstone of the Chinese mechanical and electrical transmission industry. As a comprehensive manufacturing and service supplier, SIMO specializes in the development, engineering, precision manufacturing, assembly, and diagnostics of large/medium-sized high-voltage and low-voltage AC/DC motors, synchronous generators, and specialized explosion-proof motors.
With a state-of-the-art facility operating in the high-tech development zone of Xi'an, China, the company maintains three specialized manufacturing plants, one highly integrated subsidiary factory, and holds fixed assets valued at over 380 million RMB. Supported by 1,172 sets of advanced industrial processing machinery, our production throughput and engineering capabilities consistently place SIMO Motor at the top tier of international industrial machinery directories.
With over six decades of constant evolution, SIMO Motor has consistently adapted to the changing industrial landscape. Below is the historical trajectory of our legacy.
SIMO Motor was established under national government direction to supply high-duty heavy machinery to rebuild infrastructure.
Relocated manufacturing operations to a dedicated greenfield plant in Xi'an city, scaling up production capacity.
Officially renamed to Xi'an Motor Factory following extensive state integration of industrial assets and tooling lines.
Reformed from a state-owned enterprise into a highly dynamic, privately held limited liability corporation.
SIMO Motor Group established, organizing 14 specialized subsidiaries under one core global holding enterprise.
Transitioned entirely into the newly built High-Tech Industrial Zone manufacturing plant with advanced processing assets.
Re-registered as Tech Full Simo Motor, extending our global commercial reach to direct distribution hubs.
Pioneering high-efficiency transmission solutions (IE4 & IE5) and customized electric powertrains for industrial markets globally.
In the contemporary heavy industry landscape, the role of direct current (DC) motors is undergoing a significant transformation. Driven by high starting torque, accurate dynamic speed adjustment capabilities, and unmatched reliability under variable loads, DC motors remain the baseline standard for critical systems. While alternating current (AC) variable frequency drives (VFD) have captured moderate market share, heavy industries like metallurgy, paper mills, mining, and railway traction continue to depend on heavy-duty DC machines.
The primary driver behind the continued demand for DC motors is their superior performance at low speeds and high loads. In applications where immediate breakaway torque is mandatory—such as draglines, mine mills, and large metal roll-pressing machines—DC powertrains present lower system complexity, smaller footprint requirements, and higher initial torque characteristics compared to AC equivalents. Modern improvements focus heavily on stator insulation materials, thermal dissipation mechanisms, and hybrid brush configuration designs that minimize maintenance cycles.
"According to recent market research, the global industrial DC motor market continues to expand due to the modernization of heavy infrastructure. The critical requirement is to bridge the legacy footprint of installed systems with modern smart diagnostic ecosystems."
Furthermore, integration with Digital Twins and IoT analytics is redefining maintenance protocols. Modern DC motor designs feature internal sensors that monitor armature temperature, brush wear, shaft alignment, and commutator surface integrity. These real-time diagnostics feed directly into centralized plant SCADA systems, preventing catastrophic outages and extending the life of the assets.
Industrial procurement teams demand more than just equipment. They require validated quality assurances, global logistics capabilities, and alignment with localized engineering directives.
Large scale enterprise operations require full compliance profiles. Our DC motors align with CE directives (Europe), UL/CSA regulations (North America), GOST standards (Russia), and local CCC requirements.
Maximizing continuous output while minimizing physical machine footprint. Our motors feature premium grade copper windings, advanced armature insulation, and optimized ventilation to guarantee peak operating performance.
Optionally integrated with intelligent vibration and heat mapping sensors. This allows monitoring stations to track winding status, brush contact, and bearing temperature to schedule timely maintenance.
A prime example of SIMO Motor’s engineering capacity is reflected in our diversified range of products, catering to severe environments. Our research and development group designs and manufactures motors classified across 34 major product series, spanning 1,800 distinct models and over 19,500 system specifications. This covers a broad power range starting from 0.35 kW up to massive 25,000 kW custom setups.
For industrial operations requiring explosive safety compliance, SIMO provides the YBX3, YBX4, and YBX5 explosion-proof low-voltage/high-voltage induction motors. These machines feature reinforced cast-iron flameproof housings designed to safely contain internal sparks, making them ideal for underground coal mines, oil refineries, chemical production installations, and grain silos.
In municipal water treatment, large-scale pumping stations, and bulk mineral transport pipelines, the YR, YRKK, and YRKS series wound-rotor high-voltage motors offer excellent starting performance. They allow external resistances to be connected to the rotor circuit, enabling controlled soft-starting under heavy loads, which minimizes current spikes on local power grids.
In sectors where continuous speed-regulation is key, the YVFE3, YVFE4, and YVFE5 variable frequency speed-regulating low-voltage and high-voltage motors deliver reliable performance. They are designed to withstand high-frequency harmonics generated by modern variable speed drives (VSD), preventing winding degradation and premature bearing failure.
| Motor Series | Type | Power Range (kW) | Key Applications |
|---|---|---|---|
| Z / Z4 / Z2 Series | Heavy-Duty DC Motors | 0.35 to 2,000+ | Rolling mills, heavy excavators, cableways, rubber extruders |
| YXKK / YXKS | High-Efficiency HV AC Motors | 220 to 25,000 | Centrifugal blowers, large fans, water supply pumps |
| YRKK / YRKS | Wound-Rotor HV AC Motors | 160 to 10,000 | Sugar shredders, rock crushers, high-load conveyors |
| YBX3 / YBX4 / YBX5 | Flameproof Three-Phase Motors | 0.55 to 1,500 | Petrochemical pumping, coal mine extraction systems |
| TDMK / T Series | Large AC Synchronous Motors | 355 to 20,000 | Mining ball mills, mine milling, heavy pulp grinders |
The electrical machinery industry is transitioning towards high-efficiency targets, carbon footprint reduction, and digital control integration. SIMO Motor is actively developing motor lines that meet and exceed international IE4 and IE5 efficiency standards. These include the YE4 and YE5 ultra-premium efficiency induction motors, which incorporate low-loss silicon steel sheets and optimized stator slot geometries to reduce energy consumption by up to 5% compared to legacy motors.
Simultaneously, SIMO is advancing its permanent magnet synchronous motor (PMSM) systems. By integrating rare-earth permanent magnets, these systems eliminate rotor copper losses and deliver high power factors and high efficiencies across a wide load range. This makes them ideal for fan, pump, and compressor installations in high-volume process plants.
In addition, we are expanding our focus on intelligent diagnostic integrations. Future iterations of SIMO motors will offer factory-fitted IoT vibration sensors, winding RTD monitors, and brush monitoring interfaces. By pairing these devices with cloud analytics, plant operators can leverage predictive maintenance models to lower total cost of ownership and eliminate unscheduled downtime.
The Z2 series is our classic industrial DC motor line, designed to meet general utility standards with compact frame designs. The Z4 series is an optimized, low-inertia DC line engineered for variable-speed applications, featuring a square frame design that supports high power outputs. The Custom Z series includes large, high-power DC machines tailored for heavy industrial mills, mine hoists, and metal rolling complexes that require specialized mounting configurations.
TDMK series motors are synchronous machines designed specifically for high-power, low-speed applications like mining ball mills and coal grinders. They feature high starting torque, run at a constant speed regardless of load fluctuations, and provide power factor correction to the local electrical network, which helps reduce utility penalties.
Our YBX3 and YBK3 flameproof motors are built with high-strength cast-iron frames and tight mechanical joints. This design contains any internal ignition or spark within the motor housing, preventing it from igniting ambient combustible gases or coal dust present in mines and petrochemical facilities.
The YE4 (IE4) and YE5 (IE5) motors meet international ultra-premium efficiency standards. Transitioning to these models reduces winding losses, minimizes heat output, and lowers electrical energy consumption by 3% to 6%, significantly decreasing lifecycle operational costs in high-duty plants.
Yes. SIMO Motor offers custom engineering options for shaft extensions, double shafts, custom mounting dimensions (such as footprints that match older legacy equipment), and various cooling configurations including IC06 (forced ventilation), IC17 (duct ventilated), IC37 (pipe ventilated), and IC86W (water-cooled).
SIMO Motor is certified under the ISO9001 Quality System, EU CE, US UL, Russian GOST, and China CCC. Our products support applications across the power generation, mining, chemical, metallurgy, and water conservation sectors globally.
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